Tibet adjoins Xinjiang Uygur Autonomous Region and the province of Qinghai in the north, Sichuan in the east, Yunnan in the southeast, and such countries and regions as Myanmar, India, Bhutan and Nepal in the south and west along an international border of nearly 4,000 km. The 1.22-million-square-km autonomous region accounts for 12.8 percent of China's total land area.